Question

Ms. Morgan's cupcake recipe uses 8 tablespoons of butter to make 28 cupcakes.

How many tablespoons of butter would be used to make 42 cupcakes?
A. 5 tablespoons
B. 12 tablespoons
C. 22 tablespoons
D. 28 tablespoons​

Answer 1

B because if you divided 28 by8 it equals 3.5 so you divide 42 divided by 3.5

Answer 2

It takes 12 tablespoons of butter to make 42 cupcakes.

Explanation:

This is a proportions problem.

Butter/Cupcakes is
`(8)/(28)` or
`(2)/(7)` simplified. This means there are 2 table spoons of better to every 7 cupcakes.

To solve for 42 cupcakes, set

`(2)/(7) =(x)/(42)` Next, Cross multiply so that 2 is multiplied by 42 and 7 by x.

`7x=84` Divide to isolate x

`x=12`

Since x represents the amount of butter, you would need 12 tablespoons of butter to make 42 cupcakes.